![]() ![]() Mesoporous carbons with a pore size in between 2 and 50 nm are of great interest regarding their potential application in adsorbing large organic molecules in contrast, microporous carbons with an enlarged specific surface area are more suitable for the adsorption of volatile organic molecules, hydrogen storage, and CO 2 capture. The effects of molecular flexibility of the starting cyanate ester on the micro- and mesopore distribution as well as the CO 2 and iodine adsorption behaviors of the porous carbons are therefore probed in this study. The a-BNC derived from rigid BNC contains both micro- and mesopores and is high in adsorbing both CO 2 (6.3 mmol/g) and iodine in contrast, the microporous a-BPAC is lower in adsorbing CO 2 (3.9 mmol/g) and iodine. Further KOH activations of c-BPAC and c-BNC produced the respective porous a-BPAC and a-BNC carbons, which mainly contain oxygen heteroatoms. Primarily, PCT reactions of BPAC and BNC generated the respective nonporous c-BPAC and c-BNC precursors, which contain high amounts of nitrogen and oxygen heteroatoms. In this aspect, two porous carbons, with the potential use as adsorbents for CO 2 and iodine, were prepared from polycyclotrimerizations (PCTs) of flexible bisphenyl A dicyanate (BPAC) and rigid binaphthalenyl dicyanate (BNC) cyanate ester monomers. The adsorption ability of porous carbons toward contaminants is closely related to the porous structures and the working functional groups. ![]()
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